

000 

WWUS20 KWNS 221704

SEL3

SPC WW 221704

INZ000-KYZ000-OHZ000-LEZ000-230000-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 593

NWS STORM PREDICTION CENTER NORMAN OK

105 PM EDT SUN JUN 22 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       EXTREME SOUTHEAST INDIANA

       EXTREME NORTHERN KENTUCKY

       SOUTHWEST...CENTRAL...AND NORTHERN OHIO

       LAKE ERIE



EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 105 PM UNTIL 800

PM EDT.



HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70

MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 55

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 30 MILES WEST

SOUTHWEST OF DAYTON OHIO TO 10 MILES EAST SOUTHEAST OF YOUNGSTOWN

OHIO.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED

WATCH OUTLINE UPDATE (WOUS64 KWNS WOU3).



REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE

FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH

AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR

THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS

AND POSSIBLE WARNINGS. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY

DO PRODUCE TORNADOES.



DISCUSSION...SCATTERED THUNDERSTORMS WILL LIKELY DEVELOP BY 18Z IN A

NE-SW CONFLUENCE BAND ACROSS CENTRAL OH AS THE LOW LEVELS

DESTABILIZE AND A MID LEVEL TROUGH APPROACHES FROM THE W.  MODERATE

INSTABILITY AND A GRADUAL INCREASE IN LOW-MID LEVEL VERTICAL SHEAR

WILL CONTRIBUTE TO AN ENVIRONMENT FAVORABLE FOR ORGANIZED

CLUSTERS/LINES WITH DAMAGING WINDS AND LARGE HAIL THROUGH THE

AFTERNOON.



AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT

TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM

MOTION VECTOR 25025.





...THOMPSON

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